The attack Decay is small format. For simple operation this one is cheaper and smaller then it's brother. From youtube learnings I think differences are here : It has less room to control (faster from point 1 to point2). Sound is less warm. And the swell seems shorter at max. but for simple use, together with dirt maybe, you don't need this details. Sound is very good and organic and well tracked as often with EHX. I was surprised that the functional range (that has impact) is so small on the attack and the sensitivity. Often it is about 12 with the attack. The rest doesn't give much because of envelope maths. A little disspointment, but probably the same with the big one (except from range within). Anyway, as I am only interested in the attack and swelling, I will change it for a pico Swello. It seems more interesting for me, with filter possibility. I hope it will be a shoegaze secret in front of fuzz.